164. Javascript
window.addEventListener('WebComponentsReady', function () {
var board = document.getElementById('board'),
r = document.getElementById('r'),
show = document.getElementById('show');
show.innerText = 0;
board.on('ready',function ready() {
var servo = document.getElementById('servo'),
a = 0;
servo.angle= -a + 90;
show.innerText = a;
r.addEventListener('change',function(e){
var t = e.target;
a = t.value;
servo.angle= -a + 90;
show.innerText = a;
});
},false);
}, false);